#!/usr/bin/env python
#-*- coding:utf-8 -*-
from __future__ import division
'''
   changeCentiGrade.py
   autor wenzhui
   华氏度转换到摄氏度
   C = (F-32) * (5 / 9)
'''
def cal(f):
    return round((f - 32) * (5 / 9),1)

print cal(80)
